Old cars pollute more, creating massive green house gas emissions.
Other than cars, using old things is good for the planet and I have learned so much about using things here. Of course, I rarely threw anything away in the states either, I figured if I didn't need it, someone did, I always gave my stuff away to someone who could use it, or sell it, or otherwise pass it along to others.
Any of these lessons could happen anywhere. Americans come here and talk about the "laid back" life or the "cafe culture" but it really doesn't cross my mind because living a laid back life is how I live anywhere. America has country folk too, and farms, and back roads, and poor people, and people who grow their own food, but no one notices. Some people have to step away from their own culture and their own lives to be able to see some things. That is sad. I can't say how many times I've heard people say things about Argentina and the culture here that could easily be said about the States. I grew up in the deep South and we had a life that is much like the romanticized version of Argentine life that many Americans have. Life was cheap, easy and the children were free to play and live out our innocence. All countries have city and country life, have people who live in the city in the "rat race" and people who step outside.
I teach yoga, and most of my students are expats because Argentines who live in the city are too stuck in the rat race to come to class. They send me emails bemoaning their stressed out lives and how hard it is to get to class, how long the hours are that they work and commute and so on. Sound familiar? It isn't Argentina, it's because as an expat you've CHOSEN to step out of the race...